LED controllers are devices, designed to control LED RGB (red-green-blue) systems and modules. They are installed between the power supply and the corresponding LED elements which will be further operated. The output terminals of the device are connected to the LED lighting, strip or module with four conductors/wires – one is the common "Plus" and the other three are respectively for R, G and B colors.
When the LED controller is installed and connected, special attention should be paid to the correct installation of the common "Plus" wire.
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